Cable clamp



April 23, 1929. o. E. ROHRER CABLE CLAMP Filed Sept. 6, 1928 2 Sheets-Sheet an wuh.

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Jwpmtov g D. E. ROHRER CABLE CLAMP Filed Sept. 6

April 23, 1929.

. 1928 2 Sheets-Sheet, 2

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UNITED STATES DOSSA ROHRER, OF CHARLOTTE, NORTH CAROLINA.

CABLE CLAMP.

Application filed September 6, 1928.

This invention relates to a cable clamp made in various types and sizes for use on cables of any size, and also adapted to be used on any type of strain insulator as deadond, for tiiirning a corner, for holding a strand of a cable and atthe same time providing a means for the cable to pass through the clamp to any desired apparatus without the necessity of making a splice. This cable clamp may be used on either insulated or bare cable.

An object of my invention to provide a cable clamp, which is of straight line design and being adapted to put the strain from the cable on a direct line with the insulatoreye.

Another object of my invention is to provide a cable clamp which adaptable to any type of strain insulator.

Another object of my invent-ion is to pro vide a cable clamp by means of which a full clamp effect may be provided by means of having guides on each side, which are adapted to hold the cable in its original shape and to prevent the cable strands from pushing out at the sides of the clamp, while at the same time providing corrugations in both portions of the clamp in the groove in which the cable is adapted to be secured, said corrugations staggered with relation to each other so as to reduce to a nilinimum the possibility of the cable slipping.

Another object of my invention is to proride a cable clamp which so designed that the strain from the clamp bolts is all transferred against the sides of the cable, and in which the bolt heads are locked so that the bolts may be tightened by the use of one wrench only, and which is provided with a protective guide on each end of the clamp to prevent the cutting of cable strands due to vibration, and in which there is also provided a bend-forming bridge on the forward end of the clamping part which automatically bends the cable as the clamp is tightened around it.

Another object, of my invention is to pro-- vide a cable clamp having a minimum width with max mum strength so as to provide maximum clearance between phases when installed on standard phase spacings,

Some of the objects of my invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which Figure 1 is a side elevation of one of my cable clamps;

Serial No. 304,327.

Figure 2 is a plan view of my cable clamp looking downward in Figure 1;

Figure 3 is a top plan view of my cable clamp looking upward in Figure 1;

Figure 4 is a bot-tom plan view of the main portion of my cable clamp with the lower portion thereof removed and showing the in nor face thereof; I

Figure 5 is a view of the interior face of the shorter portion of my cable clamp;

Figure 6 is a side elevation showing a forth of my cable clamp attached to an insulator and used as a dead-end;

Figure 7 is a view similar to Figure 6 with the cable being adapted to be passed on beyond the insulator;

Figure 8 shows the use of my cable clamp for the installation of switches, transformers, step-up stations, etc.

tcferring more particularly to the draw ings the numeral 10 indicates the base portion of my cable clamp which has the forked portions 11 and 12 in which the bolt 13 is adapted to be placed. for securing the same to an insulator or other object. This portion 10 has the side portions 14 and 15 with thecent-ral rib 16 on the top side th reef and the bend-forming bridge 17 extending from the rib 14 to the rib 15. The clamping portion of the member 10 is indicated by the numeral 18 and this has the longitudinally and centrally disposed groove 19 therein with the ribs 20 running transversely of the groove, and spaced holes 21 are provided on each side of the groove with the ribs 22 being disposed transversely and running to the side wall of the groove 19 and the upstanding projections 23 are provided on each side of the groove 19, which projections are adapted to pass through the holes 24 in the member 25, and the member-25 has the projections 26 which are adapted. to project through the holes 2'? in 1ll(?.lll(il:- her 18. The member 525 has the holes 25 there-- in throng 'iid bolts also being adapted to pass the holes 21 in the member '18. The member 233 has the ribs 32 which are similar to the ribs 22 on the member 18 which serve for reinforcing purposes, and similar ribs 33 are provided on the lower side of the member 25, which is the upper side in Figure 1 and the portion 18 has the transverse ribs on the upper side thereof, which is the lower side in Figure 1 which ribs serve for reinforcing purposes and also serve to prevent the heads of the bolts from turning.

which the bolts 30 adapt-ed llt) These bolts 3.0 have the nuts thereon with the lock washers 36 and the ends of the por-' tions 18 and 25 are rounded as at 36" and 37 to prevent the strands of the cable from be. ing cut, and on the opposite endof the mem' ber 25fro1n the point 37 the groove 38 is h0llowed out as at 39, which portion cooperates with the bend-forining bridge 17 to automatically bend the cable and to prevent the same i from being cut as would be the case were the ends of the clamping portions not rounded as illustrated' The member 25 which has the-rein, also has the transverse ribs 40 which are staggered with relation to ribs 20 so as to give a' maximuin clamping efiectupon the cable. In Figure 4 I have shown the clevis. portion formed from the members 11 and 12 to be disposed at right angles to the clevis portions in Figures 1, 2 and 3, which is done for the purpose of illustrating that the clevis portion of the cable clamp may be disposed at any desired anglewith the relation. to the clamping means proper in order to fit the particular insulator or in order tosuit the re quirements under which the cable'clamp' is" desired to be used, which clovisportion is indicated' by the numeral all in Figured, v

v In Figures 6, 7 and S I show a form 011 my cable clamp in' which there are only three sets of bolts instead oi 'tour as illustrated in Figures 1 to 5, and. in which case the pro ect1ons on one of the members 18 or 25. will be eliminated. as these proqectrons, as indlcatcd by the 'ntuneral 23 01126 are adapted to till the spaces between, the bolts 30 and to prevent-the cable fronispreading between the bolts whcnit is firmly clamped inmy device, and inFigure 6 I show the insulator 42 in which my cable clamp l8 is secured with the cable l i passingtherethrough, and this form of illustration shows the manner in which any size of my cable clamp may be used when the cable is deemed to be dead-ended, While in Figure? the structure is the same, but ltshows the cable 44 being passed downwardly where it can be lcdto any desired point. In Figure 8 I have shown two of my cableclainps secured to suitable insulators 45 and 46, which 111 turn are secured to the insulator member 4:7 which is secured to the cross arm 48 and co-operating with the insulators 50 and 51-is thc'switch mechanism 52 with the cables 44 being passed through by cable clamps 4:3 andconnected to the switch mechanism, it being understood that this switch mechanism 1s merely illustrative and may be CllSGZU'ClGClIOl substitution instead thereof theqtranstormer, stepup station or any other desired arrangement.

By the constructionof the above described,

and especially in View of the r'e-inforcing ribs 2 22,33 I obtain a structure which will transmit i all of the clamping effect directly against op posits sides of the cable and which combines the groove 88 maximum strength and minimum width so as to make my cable clamp very desirable in phase spacings, so as to provide a maximum clearance between the phases.

My cable clamp can be made of any desired material, but the preferred materialniay be stated. as follows:

, The mainport-ion10 together with the poi" tion 18 is made of malleable iron, while the.

lowerportion 25 is made of brass which eliminates the magnetic circuit and subsequent inductive heating current. v

In the drawings and specification Ihav'e set forth'a preferred einbodimentjot my invention, and although specific terms are emwhen used on alternating V ployed, they are used in a generic and descriptive sense only,and not for purposes of limitation, the scope of the inventionbeingprojections in alinement with the said holes and CllSPOSOCl therebe'tween, a pluralityyof transversely disposed ribs, a bottom member having a longitudinally disposed groove therein, a plurality of transverse ribs in said groove an d'being adapted to occupy a point intermediate the traij sverse ribs in the base member or main portion, a plurality of alined holes on each side of the'groove adapted to receivebolts, a plurahty of pro]ectio-ns intermediate the said holes, the projections on one member being adapted to pierce holes in the other member and to fill the space ber tween the bolts to preventthe cable from spreading when in ClAIIIDQdlPOSitlOIi.

V 2. A cable clamp comprising a main por tion and a minor portion, alined grooves in both portions and being longitudinally dis posed with relation to the said portions, a'

plurality ,of ,alined' holes in the portions. I

adapted to receive bolts, a plurality oi? proj ections on each portion disposed between. the

said-bolts'and beingiadapted to project thru holes in the other portion, abcnd-forming bridge in the main portion adapted to cooperate with the rounded end of the groove in the minor portion toautomatically form a bend in I the cable the same is clamped, "and transversely disposed ribs on both sidesof the said portions, said ribs being adapted to prevent the said bolts fron'rturning'and to also act as reenforcing elements. 3." A cableclamp comprising a main por tion and a lower portion-having coniciding longitudinally disposed groovesatherem,

means for securing the two portions around a cable, pro ect1ons on each portion: adapted to penetrate holes in the other portion, an eye portion on the main portion for securing the cable clamp to any suitable support, said eye member being in alinement with the central point of the cavity formed by the groove in which the cable is clamped.

4. A cable clamp comprising an elongated portion and a shorter portion adapted to be secured to the elongated portion by means of bolts, longitudinally disposed alined grooves in the two portions, the ends of the grooves being rounded and a bridge in the elongated portion adapted to cooperate with the rounded portion of the shorter portion to form a bend in the cable when the two portions are secured around a cable.

5. In a cable clamp, a main portion and an auxiliary portion a longitudinal groove in each of the portions, a plurality of bolts adapted to penetrate both portions to secure the same around a cable and a plurality of projections on each of the portions adapted to penetrate holes in the other portion to fill the spaces between the bolts to prevent the spreading of the cable when clamped in position.

6. In a cable clamp, two portions adapted to be secured to each other by means of rows of alined bolts, coinciding alined grooves in each of the portions, a plurality of projections on each of the members filling the spaces between the bolts, means on the end of one of the members for securing the same to a support, the ends of the grooves being of larger dimensions than the main portion thereof, and a bend-forming bridge located in close proximity to the end of the groove in one of the members adapted to cooperate with the end of the groove in the other member to automatically bend the cable as the same is clamped by the two members.

7. In a cable clamp, a main portion and an auxiliary portion, a longitudinal groove in each of the portions, a plurality of bolts adapted to penetrate both portions and to secure the same around a cable, a plurality of projections on one of the portions adapted to penetrate holes in the other portion, said projections being adapted to till the spaces between the bolts to prevent the spreading of the cable when clamped in position, and prevent one portion shifting its position with relation to the other portion.

8. A cable clamp comprising an elongated portion and a shorter portion adapted to be secured to the elongated portion by means of bolts, longitudinally disposed alined grooves in the two portions, the ends of the grooves being rounded and a bridge in the elongated portion being adapted to cooperate with the rounded portion of the shorter portion to form a bend in the cable when the two portions are secured around a cable, projections on one of the portions, holes in the other portion through which the projections are adapted to fit when the two portions are secured around the cable.

9. A cable clamp comprising a main por tion and an auxiliary portion, said portions having coinciding longitudinally disposed grooves therein, means for securing the two port-ions around the cable, projections on one portion adapted to penetrate holes in the other portion, an eye portion on the main portion for securing the cable clamp to any suitable support, said eye member being in alinement with the central point of the cavity formed by the groove in which the cable is clamped.

In testimony whereof I affix my signature.

DOSSA E. ROHRER. 

